I didn't own a Switch in any form until 2020, so I have a bit of catching up to do with regards to Nintendo games, but from what I can tell, if anything, Nintendo seems a bit more experimental with certain IPs than back in the 3DS days. At least, that's what I gathered, playing through Breath of the Wild and Fire Emblem: Three Houses. I seem to remember, back in the 3DS days, the consensus being that Nintendo was playing it too safe, sticking too much to what they've done before (and thus the recent nostalgia for the era always struck me as kinda weird).
Granted, I didn't really "grow up" with NIntendo; my first console as a kid was a PlayStation 2, and while I had a GBA, I never really played any Nintendo first-party titles on it. I kinda had to go out of my way to start playing NIntendo games at around 12, when I asked for a DS and got a 3DS. My point is the nostalgia factor that others have with the company is missing, to a degree, on my end.
I mean, I do see where you're coming from. I got Smash Bros. Ultimate thinking I would pour hours into it like I did with 4, but all I ended up doing was barely touching World of Light and only occasionally playing the game with friends. But I'd chalk that up more to me being in a different position than I was in high school. Video games, as a medium, are getting old enough to the point where we're beginning to see shifts in opinions on games between generations, and oftentimes our opinions aren't as clear-cut and logical as we like to make them out to be, often being influenced by where we were in life at the time.
I guess, just because something is different from what you're used to, doesn't necessarily make it worse. Times change, and people join and leave studios. It's best to approach newer games with an open mindset and not get too muddied down in expectations.